The CT801 family of electropneumatic transmitters provides level measurement in all sea conditions at low cost of ownership. The transmitters offer proven reliability and have been installed on more than 2,000 vessels worldwide.

What Is It?

What is it

The CT801 electropneumatic transmitters are offered as a standalone unit that is corrosion resistant and can be mounted on bridge or in a cabinet called TN3801. The standalone unit is intrinsically safe and is loop powered 4 to 20 mA. The TN3801 cabinet houses up to 24 devices in a very small footprint, is mains powered and communicates to the ship system via two RS422/ RS485 data connections. These level transmitters are designed for level measurement of all types of liquids in all kinds of tanks, including ballast tanks and service tanks.

These transmitters provide accurate measurement, are very durable and are resistant to corrosion. Other advantages include:

Low air or neutral gas consumption

Compact design

Electrical and pneumatic self-protection

Easy installation

Short time for commissioning

Low maintenance

Double communication in bus

Approved by major classification societies.

How Does It Work?

How it works

​The sensor continuously measures the differential pressure of a flux of air. This flux of air is directed to the bottom of the tank through a pipe and creates bubbles (often called the "bubbling system"). The pressure differential in the air pipe is directly proportional to the level of liquid inside the tank. This pressure is transmitted to an electronic conditioner, including a pressure sensor, which provides an electrical analog output signal.

What Problems Does It Solve?

Problem it solves

​Knowing the level of liquid in ballasts at all times is extremely important to the safe and efficient operation of the ship. CT801 electropneumatic transmitters provide a solution that works reliably and durably with little need for maintenance or calibration.

Case Studies

Case Studies Overview

Training & Support

Training and Support Overview

​Training, maintenance and support are critical aspects to consider when choosing a technology partner. Honeywell offers world-class training through our Automation College as well as comprehensive maintenance and support services designed to leverage your physical and intellectual assets and help you sustain and increase their value and performance over time.